Initial project setup for PhaseFlow

Set up Next.js 16 project with TypeScript for a training decision app
that integrates menstrual cycle phases with Garmin biometrics for
Hashimoto's thyroiditis management.

Stack: Next.js 16, React 19, Tailwind/shadcn, PocketBase, Drizzle,
Zod, Resend, Vitest, Biome, Lefthook, Nix dev environment.

Includes:
- 7 page routes (dashboard, login, settings, calendar, history, plan)
- 12 API endpoints (garmin, user, cycle, calendar, overrides, cron)
- Core lib utilities (decision engine, cycle phases, nutrition, ICS)
- Type definitions and component scaffolding
- Python script for Garmin token bootstrapping
- Initial unit tests for cycle utilities

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/components/dashboard/decision-card.tsx

@@ -0,0 +1,17 @@
+// ABOUTME: Dashboard card displaying today's training decision.
+// ABOUTME: Shows decision status, icon, and reason prominently.
+import type { Decision } from "@/types";
+
+interface DecisionCardProps {
+  decision: Decision;
+}
+
+export function DecisionCard({ decision }: DecisionCardProps) {
+  return (
+    <div className="rounded-lg border p-6">
+      <div className="text-4xl mb-2">{decision.icon}</div>
+      <h2 className="text-2xl font-bold">{decision.status}</h2>
+      <p className="text-gray-600">{decision.reason}</p>
+    </div>
+  );
+}